diff --git a/rtmp/rtmp_test.go b/rtmp/rtmp_test.go
index 01dad10f..094457ac 100644
--- a/rtmp/rtmp_test.go
+++ b/rtmp/rtmp_test.go
@@ -30,10 +30,10 @@ LICENSE
 package rtmp
 
 import (
+	"bytes"
 	"fmt"
 	"io/ioutil"
 	"os"
-	"path/filepath"
 	"runtime"
 	"testing"
 	"time"
@@ -171,24 +171,24 @@ func TestFromFrame(t *testing.T) {
 		t.Errorf("Session.Open failed with error: %v", err)
 	}
 
-	b, err := ioutil.ReadFile(filepath.Join(testDataDir, "AusOcean_logo_1080p.h264"))
+	// TODO: don't hard code this path
+	b, err := ioutil.ReadFile("/home/saxon/Desktop/singleframe.h264")
 	if err != nil {
 		t.Errorf("ReadFile failed with error: %v", err)
 	}
 
-	// Pass RTMP session, true for audio, true for video, and 25 FPS
-	// ToDo: fix this. Although we can encode the file and YouTube
-	// doesn't complain, YouTube doesn't play it (even when we
-	// send 1 minute's worth).
-	flvEncoder := flv.NewEncoder(s, true, true, 25)
-	for i := 0; i < 25; i++ {
-		err := flvEncoder.Encode(b)
-		if err != nil {
-			t.Errorf("Encoding failed with error: %v", err)
-		}
-		time.Sleep(time.Millisecond / 25) // rate limit to 1/25s
+	const noOfFrames = 1000
+	videoData := make([]byte, 0, noOfFrames*len(b))
+	for i := 0; i < noOfFrames; i++ {
+		videoData = append(videoData, b...)
 	}
 
+	const frameRate = 25
+	flvEncoder := flv.NewEncoder(s, true, true, frameRate)
+	err = lex.H264(flvEncoder, bytes.NewReader(videoData), time.Second/time.Duration(frameRate))
+	if err != nil {
+		t.Errorf("Lexing failed with error: %v", err)
+	}
 	err = s.Close()
 	if err != nil {
 		t.Errorf("Session.Close failed with error: %v", err)
diff --git a/stream/lex/lex.go b/stream/lex/lex.go
index 115915c3..e48d72d1 100644
--- a/stream/lex/lex.go
+++ b/stream/lex/lex.go
@@ -120,9 +120,10 @@ outer:
 				nonIdrPic = 1
 				idrPic    = 5
 				paramSet  = 8
+				sei       = 6
 			)
 			switch nalTyp := b & 0x1f; nalTyp {
-			case nonIdrPic, idrPic, paramSet:
+			case nonIdrPic, idrPic, paramSet, sei:
 				writeOut = true
 			}
 		}